CNA
| Canadian National Railways | 4 |
CNW
| Chicago & Northwestern | 3 |
CR
| Conrail | 1 |
GTW
| Grand Trunk Western | 15 |
IC
| Illinois Central | 1 |
ICG
| Illinois Central Gulf | 4 |
MP
| Missouri Pacific | 11 |
NS
| Norfolk Southern | 14 |
SOU
| Southern | 4 |
SP
| Southern Pacific | 1 |
SSW
| St Louis Southwestern (Cotton Belt) | 2 |
UP
| Union Pacific Railroad Company | 1 |